Well I ended up picking one up at a close out price for 83.00. Worked fine for several days but the last few days it has been acting different. It gets about half the water brewed normally then starts making a loud sound like the final flushing sound and just pushing foam. I've cleaned the shower head, even though it didn't need it. I'm using one scoop of grounds for a 6oz. cup.

Thanks, I did watch the video. Mine was only 5 days old and sometimes would dry pulse until I turned it off. I took it back to Lowes and exchanged it for a new one. This one has worked great for the first two days and this morning did 3-4 dry pulse cycles. Are you roasting/grinding your own beans? This roast is only 7 days from roast and saturday would have been day 5.

It is starting to do the same thing as the last unit. It will get about a half cup (half the water I put in) and then start getting loud and pushing foam. It did get all the water pushed through, but took some time . They work great for a few days. I,m calling bunn. To me it seems as though the pump is not powerful enough for fresh beans.

Like you, I use my MCU with fresh beans every morning. It's working great but I did run into the same problem. It's because my valve got clogged and there was a good youtuibe video demonstrating the cleaning process but I can't find it now.

It's simple. You unscrew the shower head...might as well rinse it off and clean that. After you remove it, when you look up at where it was you will see two white circular valves. One valve shoots out the water and the other shoots out the air. The video showed a guy straightening out a paperclip into a small hook and he gentley pulled out the white valve. It worked for me...I ran it under water and sure enough there was a single grind in it...once rinsed and put back together all was perfect...and remains that way today.

I can't remember which valve was the air and which was the water but you could just rinse both.

Like you, I use my MCU with fresh beans every morning. It's working great but I did run into the same problem. It's because my valve got clogged and there was a good youtuibe video demonstrating the cleaning process but I can't find it now.

It's simple. You unscrew the shower head...might as well rinse it off and clean that. After you remove it, when you look up at where it was you will see two white circular valves. One valve shoots out the water and the other shoots out the air. The video showed a guy straightening out a paperclip into a small hook and he gentley pulled out the white valve. It worked for me...I ran it under water and sure enough there was a single grind in it...once rinsed and put back together all was perfect...and remains that way today.

I can't remember which valve was the air and which was the water but you could just rinse both.

Thanks for the info,I will clean those valves. I actually ran a vinegar cleaning through it, even though it was only a few days old. It took care of the problem for about 4 days and it started again. Cleaned it again and quit using my well water. I've been using bottled spring water now and so far it's working as it should.

Still having problems with the mcu. It started leaving 1-2 ounces in the filter cup and isn't doing the final air flush. Since this is my third unit, I may have to move on to another single cup. Both my daughters have Kurigs and aren't having any problems.

If you are always using the grounds drawer, there is a common problem that would result in no final air flush and a short cup using the Bunn MCU. I really love this machine because it's easy to use, small, and makes a fabulous cup using the grounds drawer. Fortunately, the machine can be fixed and parts removed/repaired/replaced fairly easily.

1) The problem for me was a clogged filter screen in the grounds drawer. It seems to mess up the timing of the machine and flows water back into the filling chamber. I observed this by removing the top during a brew cycle. Don't be fooled...the clog can only be seen when you hold it up to the light. You will clearly see where light is not coming through and this will back up your machine if your using fresh grounds.

Two fixes: Buy a replacement grounds drawer ($26) or remove the clog (soap water and a brush will NOT work)

I soaked the little filter disk in vinegar, lemon juice...even CLR for hours and while it looked clean to my eyes, it was still clogged. If I held it up to the light you could see that almost 50% of the screen was clogged. It Looked fine when your not holding it up to the light. No amount of brushing or soaking can remove it.

I took a lighter and burned it out. about 2 seconds per "pie slice" section on the disk. I kept it away from the plastic parts. Then I would quickly run it under cold water. Held it up to the light and the filter was clear as new.

The machine worked as good as new immediately after I burned the residue out. Cup tastes better...the final air flush is strong, and no more short cups.

Now I know I will have to keep up with really cleaning that filter screen so I don't have to burn out another clog. I used to simply run it under water but I now soak it in vinegar occasionally to keep the oils out. Its been great so far.

After several months of trouble free use the Bunn MCU began spewing liquid out from behind the ground coffee drawer. I use only micro filtered water to brew since we live in a rural area that tends to have particulates in the rural water district supplied water. First I removed the top of the water reservoir. There was a small amount of white residue on the plastic surfaces which was removed with paper towels. The level probes were also wiped although they appeared to be clean. Next the spray head was removed and the spray openings cleaned with a large straight pin. There was some clogging. I had noticed the spray head gasket was slightly distorted in one small area prior to disassembly, so I was careful to replace it fully seated. (I suspect the gasket was the source of the leak even though it appeared to be undamaged.) After reassembly I was able to brew only two 14 oz cups before spewing liquid again. Suspecting the spray head gasket was still being over pressured due to clogging, it was disassembled once again. This time I placed the spray head and ground coffee drawer filter screen in a solution of soda water in a Pyrex bowl and brought to a boil in the microwave and let soak until cool. A quantity of brown crud residue was noted in the soda water after removal of the parts. The air and water valves were also removed and found to be clean and clear. Since reassembly I have made only two 14 oz cups. The coffee was noticeably better than any I have brewed recently. Hopefully the fix will last until the Technivorm I ordered as a backup arrives. Vic

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